Create documentation for Explore California project

[ProtossGP32]

We need documentation regarding the steps done up until now:

• Environment preparation
  • Install Docker
  • Add management with docker compose
    • Create multiple docker images and containers for each requirement
• Run some automated tests for docker compose (rspec, Capybara, webdriver, Selenium...)
• Deployment
  • Creating a Terraform Dockerfile --> Superceded by available Docker images of Terraform
  • AWS Deployment
    • S3 snippets refactored to comply with newest versions
• Writing integration tests

Remember, the single source of truth in the deployment here is the Terraform configuration file.